Biomechanical differences during ascent on regular stairs and on a stairmill

Area of Science:

• Biomechanics
• Human Movement Science
• Rehabilitation Engineering

Background:

• Stair climbing is a demanding activity requiring joint mobility, muscle strength, and balance.
• Powered stairmills offer potential for gait rehabilitation for individuals with stair-climbing difficulties.
• Understanding kinematic and muscle activation differences between stairmills and real stairs is crucial for effective training system design.

Purpose of the Study:

• To compare the kinematics and muscle activations during stair climbing on regular stairs versus a powered stairmill.
• To identify specific biomechanical differences that could inform the development of gait rehabilitation devices.

Main Methods:

• Twelve healthy subjects participated in the study.
• Subjects performed five trials of walking on regular stairs.
• Subjects then completed one minute of continuous walking on a powered stairmill.

Main Results:

• Stairmill walking showed an increased percentage of the stance phase within a walking cycle compared to regular stairs.
• A greater ankle plantarflexion angle was observed during the stance-to-swing phase transition on the stairmill.
• Reduced activation of the tibialis anterior muscle was noted during the swing phase on the stairmill.

Conclusions:

• Significant biomechanical differences exist between stairmill and regular stair climbing.
• These differences, particularly in stance phase duration and specific muscle activations, provide valuable data for optimizing stairmill-based rehabilitation strategies.
• Findings can enhance the interpretation of data collected during stairmill use in clinical and research settings.